Library Records Privacy:

CODE OF MARYLAND STATE GOVERNMENT TITLE 10. GOVERNMENTAL PROCEDURES SUBTITLE 6. RECORDS PART III. ACCESS TO PUBLIC RECORDS Md. STATE GOVERNMENT Code Ann. § 10-616

§ 10-616. Same — Specific records

(a) In general. — Unless otherwise provided by law, a custodian shall deny inspection of a public record, as provided in this section.
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(e) Circulation records, or other item, collection, or grouping of information about an individual. —
(1) Subject to the provisions of paragraph (2) of this subsection, a custodian shall prohibit inspection, use, or disclosure of a circulation record of a public library or other item, collection, or grouping of information about an individual that:

(i) is maintained by a library;
(ii) contains an individual’s name or the identifying number, symbol, or other identifying particular assigned to the individual; and
(iii) identifies the use a patron makes of that library’s materials, services, or facilities.
(2) A custodian shall permit inspection, use, or disclosure of a circulation record of a public library only in connection with the library’s ordinary business and only for the purposes for which the record was created.
(f) Gifts. — A custodian shall deny inspection of library, archival, or museum material given by a person to the extent that the person who made the gift limits disclosure as a condition of the gift.

(a) Inspection, use, or disclosure prohibited. — Subject to the provisions of subsection (b) of this section, a free association, school, college or university library in this State shall prohibit inspection, use, or disclosure of any circulation record or other item, collection, or grouping of information about an individual that:

(1) Is maintained by a library;

(2) Contains an individual’s name or the identifying number, symbol, or other identifying particular assigned to the individual; and

(3) Identifies the use a patron makes of that library’s materials, services, or facilities.
(b) Exceptions. — A free association, school, college, or university library in the State shall permit inspection, use, or disclosure of the circulation record of an individual only in connection with the library’s ordinary business and only for the purposes for which the record was created.